Rionya, Fire Dancer, and Bloodthirster

Prerequisites

• Rionya, Fire Dancer on the battlefield
• Bloodthirster on the battlefield

Steps

1. At the beginning of your combat phase, Rionya triggers, creating at least one token copy of Bloodthirster with haste
2. Deal combat damage with the Bloodthirster token
3. The Bloodthirster token triggers, causing you to untap it and to get an additional combat phase after this one
4. Repeat

Results

• Infinite combat damage
• Infinite combat phases
• Infinite creature tokens with haste
• Infinite ETB